Fix nix shell (#17982)

Recently `cmake` was added as a build-time dependency to the wasm
runtime. This adds that dependency to our nix shell env.

Release Notes:

- N/A

flake.nix

@@ -7,10 +7,7 @@
       url = "github:nix-community/fenix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
-    crane = {
-      url = "github:ipetkov/crane";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    crane.url = "github:ipetkov/crane";
     flake-compat.url = "github:edolstra/flake-compat";
   };